GPS enables you to get lap times without the use of magnetic or infrared sensors. It also records speed without the use of a speed sensor, and maps out the track on the Visual Data software for lap analysis and lap to lap comparison. Medium Display Model, GPS, Timing to 1/100, Data Recording: 5/10/20, 9 LED's for RPM or Lambda, 2 LED's for Temp or Pressure, 5 Counters of Engine Time Value, Bluetooth, Backlight$550.00 each (inc GST)